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[F] 502.9.7 Highly Toxic and Toxic Compressed Gases - Any Quantity
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Ventilation exhaust shall be provided for
highly toxic and toxic compressed gases in any quantity as
required by Sections 502.9.7.1 and 502.9.7.2.
Gas cabinets containing
highly toxic or toxic compressed gases in any quantity
shall comply with Section 502.8.2 and the following
requirements:
- The average ventilation velocity at the face of gas cabinet access ports or windows shall be not less than 200 feet per minute (1.02 m/s) with a minimum velocity of 150 feet per minute (0.76 m/s) at any point at the access port or window.
- Gas cabinets shall be connected to an exhaust system.
- Gas cabinets shall not be used as the sole means of exhaust for any room or area.
Exhausted enclosures
containing highly toxic or toxic compressed gases
in any quantity shall comply with Section 502.8.2 and
the following requirements:
- The average ventilation velocity at the face of the enclosure shall be not less than 200 feet per minute (1.02 m/s) with a minimum velocity of 150 feet per minute (0.76 m/s).
- Exhausted enclosures shall be connected to an exhaust system.
- Exhausted enclosures shall not be used as the sole means of exhaust for any room or area.
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